Vitamin B9 (Folinic Acid) vs Folate (5-MTHF)
Two forms of the same compound. What differs is how much of it your body absorbs, how well you tolerate it and what it costs per month.
Side by side
Green marks the better value| Vitamin B9 (Folinic Acid) | Folate (5-MTHF) | |
|---|---|---|
| Absorption score | 98/100 | 95/100 |
| Cost per 10 mg delivered | $48.59 | $11.7 |
| Safety rating | 8/10 | 9/10 |
| Cost per month | $100 | $20 |
| Daily dose | 400-1000 mcg | 400-800 mcg |
| Best timing | With food | Morning with food |
| Evidence level | B | A |
Verdict
Folate (5-MTHF) wins on 3 of the measurable metrics.
Per 10 mg delivered it costs $11.7 against $48.59 — the price comparison that accounts for both elemental content and absorption.
What actually differs
Vitamin B9 (Folinic Acid)
Active metabolite of folate that bypasses MTHFR enzyme limitations and genetic polymorphisms
- Bypasses all genetic limitations
- Medical grade
- Maximum bioavailability
- Clinical applications
- Extremely expensive
- Often requires prescription
- May mask B12 deficiency
- Overkill for most people
Folate (5-MTHF)
Active form of folate essential for DNA synthesis, methylation, and fetal neural tube development
- Active form
- Bypasses MTHFR
- Best for gene variants
- Most expensive
- Less stable
- Limited long-term research
What helps
Vitamin B9 (Folinic Acid) → Folate (5-MTHF)
Both required for homocysteine metabolism · level AVitamin B9 (Folinic Acid) → Folate (5-MTHF)
Complementary roles in methylation pathways · level AVitamin B9 (Folinic Acid) → Folate (5-MTHF)
Antioxidant protection of reduced folates · level BFolate (5-MTHF) → Vitamin B9 (Folinic Acid)
Complementary roles in one-carbon metabolism · level AFolate (5-MTHF) → Vitamin B9 (Folinic Acid)
Sequential steps in methylation pathway · level AFolate (5-MTHF) → Vitamin B9 (Folinic Acid)
Antioxidant protection and folate regeneration · level BHow these numbers are read
- The absorption score ranks forms of the same compound against each other. It is not a measured share of the dose — see how we derive it.
- Safety rating reflects tolerance at normal doses, not toxicity risk.
- Cost is per month at the typical daily dose, so a cheaper form taken at double the dose is not cheaper.
- Evidence level A means the form itself was studied, not just the parent compound.
Where to buy
Both forms deliver the same compound — pick by the numbers above, then check the label matches.
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Common questions
Which is better, Vitamin B9 (Folinic Acid) or Folate (5-MTHF)?
Vitamin B9 (Folinic Acid) absorbs better — 98% against 95%. Absorption decides how much of the dose actually reaches you, so it usually matters more than the milligrams printed on the label.
What is the difference between Vitamin B9 (Folinic Acid) and Folate (5-MTHF)?
Both deliver the same active compound. They differ in how well the body takes them up, how they are tolerated and what a month costs: $100 against $20.
Can you take Vitamin B9 (Folinic Acid) and Folate (5-MTHF) together?
You can, but there is rarely a reason to. Two forms of the same compound stack the same active dose, so the usual approach is to pick the better absorbed one and dose it properly.